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. 2020 Apr 27;15(4):e0231740. doi: 10.1371/journal.pone.0231740

Fig 7. Effect of crop residue return on WUE under different crop types (a), amount of N fertilizer (b), soil organic matter (c), cropping systems (d), mean annual temperature (e), and irrigation condition (f).

Fig 7

Error bars represent the mean value ± 95% CI.